Add documentation to change URL patterns
Fix syntax error in docs code example
Rework URL customisation recipe

More focus on integration into root urls.py
Improve comments on price fields on stock record
Switch to tarball URL for haystack dependency
Add admin functionality for Contributor(Role)s

Fixes #484
Tidy flatpages/layout templates
Tidy pages dashboard templates
Move reviews templates into catalogue folder
Add Transifex config and package
Add English translation files

Required by Transifex as the source language
Update .po files

This was done by Transifex command.
Add Transifex helper make command
Add Transifex link to contributing section
Switch attributes of LESS/CSS elements
Add make target for generating CSS from LESS files

Seems nicer than the generate_css.sh script there before.
Convert offer dates to datetimes

* This gives more flexibility to offers in how they are used.
* Am using a jQuery datetimepicker from: http://trentrichardson.com/examples/timepicker/
Use jQuery UI styles to get slider CSS

This overrides the previous styles though which is undesirable.  Will
need some FED attention.
Fix a conditional logic bug in condition form template

Was showing a heading unnecessarily.
Adjust JS for date(time) pickers to be configurable

This change should allow Oscar projects to configure the options that
get passed to the date widgets.